<template>
  <div id="app">
    <router-view/>
  </div>
</template>

<script>
export default {
  name: 'App',
  created () {
    // //在页面加载时读取sessionStorage里的状态信息
    if (sessionStorage.getItem("userInfo") ) {
      this.$store.replaceState(Object.assign({}, this.$store.state,JSON.parse(sessionStorage.getItem("userInfo"))))
    } 
    // //在页面刷新时将vuex里的信息保存到sessionStorage里
    window.addEventListener("beforeunload",()=>{
      sessionStorage.setItem("userInfo",JSON.stringify(this.$store.state))
    })
  }
}
</script>
<style scoped lang="scss">
#app{
  height: 100%;
  overflow: auto;
}
</style>
